Thomas bueke



T. BURKE.

SAFETY VALVE.

(NoModel.)

Patented Apr. 14, 1885.

IN VENTOR BY @Mm ATTORNEY PETERS, Phomllhagnpnor. wnnngwn. D. C.

UNITED STATES. PATENT OFFICE.

THOMAS BURKE, OF NEW YORK, N. Y.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 315,475, dated April 14, 1885.

Application filed May 9, 1884. (No model.)

To @ZZ whom it may concern:

Beit known that I, THoMAs BURKE, of the city, county, and State of New York, have invented certain new and useful Improvements in Safety-Valves for Kitchen-Boi 1ers and Heaters of Various Kinds, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part thereof.

The object of my invention is to provide a simple and easily-adjusted valve to prevent the explosion of kitchen-boilers especially. This valve is so constructed and arranged that it can be readily attached to any kind of a kitchen-boiler or other receptacle where steam is accumulated or generated.

The advantages possessed by my invention over any that have preceded it for theV purpose stated are many.

In all the steam-valves of this class now known or in use the spring which exerts the pressure on the valve is confined in the same box with the valve, and the spring, being thus exposed to the action of the steam, soon loses its elasticity and ceases to exert the required degree of resistance on the valve. r

In my invention the spring is placed at a distance from the valve-box by and constructed with the valve by a piston-rod.

Figure l is a sectional View of the valve, showing the cylinder or tube, the valve, piston, spring, and adjusting-cap. Fig. 2shows a tranverse section of the piston and valvebox. Fig. 3 is a transverse sectional view of the valve and valve-box with the dischargepipe. Fig. 4 represents the piston rod and valve, and Fig. 5 represents the spring.`

In the drawings, A is a cylinder or tube,

ates in the box G. In the upper chamber of 45 the tube A, and on the piston C, I have arin this y y ranged a spiral spring, D. This spring is p held down and its pressure on the piston C regulated by the adj listing-cap B. The valve thus constructed and arranged can be attached by the screw F to a pipe, J, on any boiler or steam-receptacle, and the resistance on the valve may be easily regulated by the adjusting-cap B. The steam in the boiler exerts the pressure 0n the valve E, and when the pressure reaches a given point the valve is forced upward and the steam or gas escapes through the pipe I.

Having thus described my invention, what I claim isi In a safety-valve for kitchen boilers and heaters, the combination, with a metallic tube, A, of a piston, C, which fits closely in said tube, and provided at the lower end with a valve-disk which operatesin a valve-box, a pressure-spring inserted between the screwcap B and the upper end of said piston, an adjusting cap, B, adapted to regulate the pressure on the piston-valve, and the valvebox G, all combined and arranged substantially as and for the purpose set forth.

THOMAS BURKE. 

